SU1685666A1 - Device for assembling shaft-bush-type parts with interference fit - Google Patents

Abstract

The invention relates to mechanical assembly production, in particular, to devices for assembling with a tension elements of the shaft-hub type. The purpose of the invention is to increase productivity by reducing the time for auxiliary operations during the assembly process. Through the nozzle 12, pressure is applied to the piston 5. After the initial mechanical pressing of the first sleeve onto the shaft 4, a high pressure is supplied to the connection point through the nozzle 7. The sleeve is pressed for its entire length and then the working medium enters the sleeve 15 and, by pushing the piston 21, presses the part until it stops at the end 26. Next, by applying pressure to the cavity B, the second sleeve is pressed into the first. 4 il.

Description

The invention relates to mechanical assembly production, in particular, to devices for assembling with tension components of the shaft-bushing type, and can be used, for example, when pressing in the inner bearing rings on the neck axles of wheel sets.

Purpose of the Invention: Increased Productivity

The goal is achieved by reducing the time for auxiliary operations during the assembly process.

Figures 1-4 show an assembly device, longitudinal section, at various successive positions of its assemblies in the process of pressing the sleeves.

The device comprises a ram cylinder having a housing 1. a rod 2 made in the form of a cylindrical glass with means 3 for fastening it to the shaft 4 as well as a hollow main piston 5 The rod 2 is made with a gasket 6 and channels for supplying the working medium, which are connected to fittings 7 and 8 housing 1 and is fixed inside the last butt on the bottom of the glass. The hollow piston 5 is made with seals 9 and 10 and fitting 11 and is installed in the housing 1 and on the rod 2 with the possibility of reciprocating movement. At the outer end of the housing 1, besides the above mentioned ones, there is also placed fitting 12 for supplying the working medium. The piston 5 is secured with an end through the seal 13 and the pressure ring 14 with the sleeve 15, which is made in the form of a cylindrical cup with a through hole in the bottom. There are 18 V fittings in the bottom hole and also in the hole of the pressure ring 14. the piston 5, as well as in the openings of the casing 15 and the pressure ring 14 is mounted with the possibility of reciprocating movement of an additional stepped piston 19 with a seal 20. In the casing

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15, an auxiliary piston 21 of the seals MI22 and 23 is mounted on the outer and inner cylindrical surfaces in a similar manner.

The device works as follows.

The pressed sleeves 24 and 25 are put on the rod 2, after which the latter is fixed to the shaft 4 by means of means 3. Through the nozzle 12, working medium is supplied into cavity A by partially pre-pressing the sleeve 24 onto the shaft to seal the interface area and then simultaneously By supplying a high pressure working medium through the nozzle 7 and the channel of the rod 2 to the interface, the hydraulic press-fitting of the sleeve 24 is carried out for the entire length of the latter. After that, the working medium of high pressure supplied through the nozzle 7 into the cavity B. pulls the auxiliary piston 21 out of the sleeve 15, pressing the sleeve 24 until it stops at the end of the part 25 (labyrinth ring of the axle box). The pressure in the cavity B is maintained by applying pressure through the nozzle 8 into the cavity B, a hydraulic pressing-in of the second sleeve 26 is performed by moving the additional piston 19. A variant of pressing the sleeve 26 with the open drain fitting 18 is also possible. In this case, a partial mechanical pressing of the sleeve 26 on the shaft 4 is first carried out pressure into the cavity B, and then the high pressure working medium is fed through the nozzle 7 into the interface and hydraulic pressing of the sleeve 26 is carried out until it stops at the end of the sleeve 24.

Claims (1)

Claims An apparatus for assembling with the tensioning parts of a shaft-hub type, comprising a power cylinder having a housing made in a cylindrical cup with fittings for supplying the working medium, a stem with means of mounting to the end of the shaft at one end, channels for supplying the medium and sealing on the cylindrical surface, and mounted coaxially with the housing and inside it and fixed on the bottom of the latter with an end face opposite to said one, as well as a hollow piston with seals on the outer and inner surfaces mounted in the housing and on the rod aligned with it with the possibility of reciprocating movement and hollow holder, characterized in that, in order to increase productivity, it is equipped with additional and auxiliary stepped pistons with seals, the first of which is mounted on the rod in the cavity of the main piston with the possibility of reciprocating post-displacement, and the second is placed similarly in the cage, the latter is made in the form of a cylindrical cup with a through hole in the bottom and seal mounted on a cylindrical the surface of the bore, the holder faces the bottom of the open end of the housing and is fastened through the pressure ring with the end face of the main piston, and the additional piston is placed in contact with its outer surface with the surface of the holder bore. J L 21 12 “13 1L  / Yu